I have a single core NAS My Live Duo. It runs Debian lenny release.
I found via htop utility that it constantly use 100% of red cpu without any noticeable process to eat it.
Than I checked via iostat ...

I recently rebuild a machine with Centos 5.8 with a brand new disk.
This machine is old and has been running 5.8 for a long period with no issues so the only thing which changed recently is the new ...

I'm looking for a tool similar to pv which is producing machine readable output.
And i cant believe that nobody did it bevore...
I looked at the manpages of pv, pipemeter, dd and cpipe but all these ...

With many new hard drive disks the physical sector size is 4096. Would it be possible to make the system use a logical sector size of the same size, rather than the default logical sector size of 512?
...

I'm using iostat to get the current disk load each second with iostat -dx 1 (specially, %util column). However, I'd like to put this in a bash script and control the interval with the watch command ...

Sometimes, especially upon login, I have a lot of disk activity. I can use iotop to see what's doing that at a given moment, but I would like to have an integral table over a given time, say the first ...

I am running a busy cacti server on centos and sometimes the rrdtool process is painfully slow when writing to disk, in HTOP the IO Column would display something between 100-300.
I a polling cycle ...

I run Debian Jessie on a quad-core i7 processor, which results in 8 cores being shown thanks to hyperthreading. On disk-heavy loads, all eight cores are maxed out with io-wait, as shown by htop. This ...

Currently I'm trying to setup a test scenario with the use of Debian Wheezy with its default kernel 3.2.60-1+deb7u3 and the cgroups blkio controller. The calculation of blkio.weight is not working for ...

One of WD external harddrives is not working when I try to access some folder. I am able to access the rest of the folders on the disk. I am getting Input/Output error as show in the attached Image.
...

I'm looking for a way to determine whether an app is doing sequential or random I/O. Is it possible to look at a blktrace capture and say if I/O is sequential or random? If yes, any examples of what ...

I want to test the disk IO performance like read, write, random read, random write and so on both in physical machine and VMs (with aufs file system).
Also I want to test the throughput performance in ...

I'm constantly using wget to download many files over 1GB each. I'm getting concerned about how this may be straining my HDD. Can wget's internal buffer size be modified so that it writes to my HDD ...

I decided to wipe my SSD with a secure erase before installing Arch Linux, since the Arch wiki said that it would improve performance. I followed the instructions listed on the wiki, but now when I ...

I have jobs that do I/O of rates peaking around 200mb/s. On high load (over twice cpu cores) I tried to copy large file and got only few mb/s. Gathered dstat show single digits in wai and sys category ...

How can I reduce the IO wait time and retry times so that the OS doesn't continually try to write to a failing drive?
I have an system that I use to make copies of demo content that gets loaned out ...

I am looking for some tool that will dump total disk I/O by a single process after it ends. So far my finding is :-
iotop= It shows i/o per process in real time but does not give total after process ...

I am trying to reduce hard-disk activity on my system. Running iotop shows that Eclipse (the IDE, latest version (Luna)) is writing kilobytes of data every few seconds.
So I ran strace on the eclipse ...

After removing APC (alternative php cache), I noticed that there are less pagination access and less dirty pages but in the same time:
High idle CPU
Very low CPU load (relatively to the time before ...

When using tar for backups I'd like to create a separate list of the files that is included in the archive for storing alongside the backup tarball.
I also want to be able to store the error messages ...

So, i'm trying to interface with a device that has 16-bit addresses, and the master I'm using also supports this mode. However since this isn't standard I2C (should be 8-bit addresses) I haven't been ...

On a server hosting a wide range of websites, I often see IO becoming a bottleneck without being able to identify the processes responsible of IO operations with tools such as iotop, iostat or sar.
I ...